Vertical blinds on a large glass front control the solar gain
Basis: made-to-measure vertical blinds from the vinelly workshop with systems from LEHA.
StardecorJAB Anstoetz

Large glass surfaces heat up

The larger the window area, the more solar energy enters the room – and the harder the cooling has to work in summer. On living room fronts, conservatories and offices, this heat gain is the biggest cost driver. This is exactly where Vertical blinds come in.

Rotatable slats control the solar gain

The decisive advantage: the slats can be rotated steplessly. This lets you screen out direct or low-angle sun in a targeted way before it heats up the room – without darkening it completely. The heat gain drops, the daylight remains, and during the day you need less artificial light. Two savings levers in one product.

Bright, reflective slats

For the energy effect, the colour counts: Bright, reflective slats reflect a larger share of the solar radiation than dark ones. For strongly sun-exposed rooms they are the energetically smarter choice – they keep the room cooler without making it gloomy.

Putting interior protection in perspective

Honestly: an exterior sun shade blocks the heat before it reaches the glass and is thermally the most effective. Interior vertical blinds reduce glare and part of the heat gain – on large interior fronts and in the office this is a noticeable, cost-effective effect that can be achieved without any work on the façade.

Especially relevant in the office

Offices combine both: large glass fronts and screen workstations. Vertical blinds keep the sun off the screen, prevent overheating and still let daylight in – reducing cooling and lighting costs at the same time. More on this in the Guide Vertical blinds for the office. Whether slats or a roller blind suit better is clarified by the Comparison Vertical blinds or roller blind.

Vertical blinds made to measure?

Configure online with pricing, free sample delivered home – or free home consultation in the canton of Zurich.

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Frequently asked questions

Good to know

Do vertical blinds save energy?

On large glass surfaces, yes. Rotatable slats screen out the direct sun before it heats up the room and thus reduce the cooling load. At the same time they still let in daylight, so less artificial light is needed.

How do vertical blinds control solar gain?

The slats can be rotated steplessly. This lets you screen out low or direct sun in a targeted way without darkening the room completely – the heat gain drops, the daylight remains.

Do light-coloured slats do more for heat protection?

Yes. Bright, reflective slats reflect a larger share of the solar energy than dark ones. For rooms with strong sun exposure they are therefore the energetically better choice.

Do interior slats work as well as exterior protection?

External sun protection blocks most of the heat before it reaches the glass. Interior vertical blinds reduce glare and part of the heat gain – on large interior fronts and in the office this is a noticeable, cost-effective effect.

Why are vertical blinds especially useful in the office?

Offices often have large glass fronts and screen workstations. Rotatable slats keep the sun off the screen, prevent overheating and still let daylight in – reducing cooling and lighting costs at the same time.